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Rating models

Rating over a time window calculator

Calculate an average using only review groups inside a chosen number of days.

Model estimate, not a platform prediction. Results may differ from real service ratings. Platforms can use unpublished weights, moderation, eligibility rules and rounding. This calculator applies only the formula below.

Your inputs

Time-based scenarios age the existing reviews by the evaluation offset. New-review age is measured on that evaluation day. Reviews outside the window contribute nothing.

Reset example
Rating over a time window · model result
4.229 / 5

70 reviews in the included groups. Group averages can make the result approximate.

Results are rounded to three decimal places.

How it works

Σ(rating × count within window) ÷ Σ(count within window)

Ages are measured relative to your chosen observation date. Age 0 is that day; the cutoff is inclusive. Older groups are excluded. Each group must contain reviews of the same age; use separate calculations if you need more than three groups.

Results update as you type. Calculations run in your browser; submitting with JavaScript disabled sends the numbers to the server to calculate the result.

Reach a target

Minimum additional 5-star reviews. Both panels use the assumptions above. Existing reviews are not edited or removed except by this method’s time window or trimming rule.

38

additional reviews needed

Simulate new ratings

4.325 / 5

80 reviews in the included groups. Group averages can make the result approximate.

Other rating methods